Alloy Steel Low Head Socket Cap Screws

Alloy steel low head socket cap screws are designed for fastening applications where overhead clearance is limited and a standard socket head would project too far above the mounting surface. Their reduced head height provides a lower-profile installation while retaining an internal hex drive for controlled installation with a hex key.

These fasteners are commonly used in robotics, automation equipment, machine guarding, tooling, inspection fixtures, conveyor systems, packaging machinery, compact mechanical assemblies, access panels, and repair applications where space around the screw head is restricted. The cylindrical low head is especially useful near moving components, adjacent panels, housings, rails, brackets, and other areas where head clearance can affect assembly design.

Cold Headers supplies alloy steel low head socket cap screws in a range of inch thread sizes and lengths, including uncommon and difficult-to-source configurations. Individual product pages provide exact thread size, length, body diameter, head diameter, head height, hex socket size, and verified key-engagement information where available. Use those dimensional specifications to confirm compatibility with the tapped hole, counterbore, surrounding components, and installation tooling.

Why Use a Low Head Socket Cap Screw?

  • Reduced head height: Supports installations with limited space above the fastener.
  • Internal hex drive: Allows installation where external wrench clearance is restricted.
  • Compact cylindrical geometry: Helps reduce interference with nearby components and moving assemblies.
  • Application flexibility: Suitable for machinery, fixtures, guards, brackets, panels, tooling, and maintenance repairs.
  • Exact-size selection: Available product pages allow engineers and purchasers to compare thread, length, head, socket, and body dimensions.

Selecting the Correct Low Head Socket Cap Screw

Begin by confirming the required thread size and screw length. Then review the head diameter and head height to make sure the screw fits within the available installation envelope. The hex socket size should match the intended installation tool, while the body diameter and minimum key engagement can help evaluate fit and drive access. Low head socket cap screws should be selected according to the requirements of the assembly rather than substituted automatically for standard socket head cap screws.

Cold Headers Inc. has supplied specialty industrial socket fasteners since 1962. Our catalog is organized to help engineers, distributors, maintenance teams, and purchasing professionals locate exact sizes, uncommon lengths, and specialty socket products without relying on broad or unsupported inventory claims.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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Alloy Steel Low Head Socket Cap Screw.png

6-32 x 1/4 Alloy Steel Low Head Socket Cap Screw
List Price (per 100 pieces) $8.25
Alloy Steel Low Head Socket Cap Screw.png

6-32 x 5/16 Alloy Steel Low Head Socket Cap Screw
List Price (per 100 pieces) $8.50
Alloy Steel Low Head Socket Cap Screw.png

6-32 x 3/8 Alloy Steel Low Head Socket Cap Screw
List Price (per 100 pieces) $8.75
Alloy Steel Low Head Socket Cap Screw.png

6-32 x 7/16 Alloy Steel Low Head Socket Cap Screw
List Price (per 100 pieces) $9.00
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6-32 x 1/2 Alloy Steel Low Head Socket Cap Screw
List Price (per 100 pieces) $9.25
Description N/A

6-32 x 1/4 Alloy Steel Low Head Socket Cap Screw is specified when machine design requires internal-hex fastening with a reduced head height. Its alloy steel construction and internal hex drive support compact mechanical fastening without requiring an external wrenching surface.

Common use cases include guarding and machine covers, where the reduced head height helps preserve clearance around moving parts and service panels. It can also support robotics and automation systems, where compact socket screws help designers work inside tight machine envelopes. The reference head height is approximately one-half of the body diameter, which is the defining low-head geometry for this family.

Because low-head dimensions are controlled by nominal screw diameter rather than length, this fastener should be selected by thread, length, and the available clearance above the assembly.

Technical Highlights

  • Material: Alloy Steel
  • Thread Size: 6-32
  • Length: 1/4 in.
  • Basic Diameter: 0.138 in.
  • Head Diameter: 0.221-0.226 in.
  • Head Height: 0.066-0.072 in.
  • Hex Socket Size: 1/16 in.
  • Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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6-32 x 5/16 Alloy Steel Low Head Socket Cap Screw helps engineers keep a compact profile in assemblies where overhead clearance is limited. The internal hex drive keeps tool engagement within the head, which is useful when machinery leaves limited overhead or side clearance.

Engineers often specify this configuration for fixture construction and precision tooling, where the lower profile can reduce interference with clamps, slides, or locating features. The same low-head geometry works in maintenance work and machinery repair, where the exact size helps buyers match drawings, repair lists, and installed hardware. The low-head form keeps head height near one-half of the body diameter, helping engineers manage clearance-sensitive assemblies.

The reduced head height is intended for clearance-sensitive assemblies where a taller fastener head could interfere with covers, guards, slides, or adjacent machine components.

Technical Highlights

  • Material: Alloy Steel
  • Thread Size: 6-32
  • Length: 5/16 in.
  • Basic Diameter: 0.138 in.
  • Head Diameter: 0.221-0.226 in.
  • Head Height: 0.066-0.072 in.
  • Hex Socket Size: 1/16 in.
  • Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

 		N/A

6-32 x 3/8 Alloy Steel Low Head Socket Cap Screw is used where a standard socket head cap screw would create too much head projection for the available machine envelope. Alloy steel construction is paired with a reduced-profile head for designs that cannot accommodate taller socket-head hardware.

It is useful in robotics and automation systems, where compact socket screws help designers work inside tight machine envelopes. It may also fit guarding and machine covers, where the reduced head height helps preserve clearance around moving parts and service panels. The reduced head height is the main selection reason when a taller socket head would conflict with nearby machine components.

For machine layouts with limited overhead space, the low-head geometry helps preserve clearance while the internal hex drive keeps installation access within the head.

Technical Highlights

  • Material: Alloy Steel
  • Thread Size: 6-32
  • Length: 3/8 in.
  • Basic Diameter: 0.138 in.
  • Head Diameter: 0.221-0.226 in.
  • Head Height: 0.066-0.072 in.
  • Hex Socket Size: 1/16 in.
  • Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

 		N/A

6-32 x 7/16 Alloy Steel Low Head Socket Cap Screw supports compact mechanical assemblies that need internal wrenching without a tall head profile. The hex socket drive supports serviceable internal wrenching while the lower head profile helps preserve clearance around moving or guarded parts.

Relevant applications include packaging machinery and conveyor systems, where a lower head can help avoid contact with guides, rails, or product flow areas. The design is also practical for packaging machinery and conveyor systems, where a lower head can help avoid contact with guides, rails, or product flow areas. Internal hex drive engagement keeps the wrenching feature within the head, supporting compact installation and service access.

The head-dimension values support checks for clearance, socket access, bearing area, and replacement fit in tooling, automation systems, and machinery repair.

Technical Highlights

  • Material: Alloy Steel
  • Thread Size: 6-32
  • Length: 7/16 in.
  • Basic Diameter: 0.138 in.
  • Head Diameter: 0.221-0.226 in.
  • Head Height: 0.066-0.072 in.
  • Hex Socket Size: 1/16 in.
  • Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

 		N/A

6-32 x 1/2 Alloy Steel Low Head Socket Cap Screw is selected for low-clearance equipment where head height, socket access, and serviceability all matter. The reduced head height helps machine builders keep assemblies compact while retaining a socket-drive installation method.

This low-head design fits instrumentation and electronic equipment, where internal wrenching supports assembly work where external tool clearance is limited. It is often considered for industrial equipment and production machinery, where low head geometry supports compact assemblies without changing the thread callout. The verified head diameter, head height, and hex key size below help purchasing teams confirm fit before quoting or ordering.

Length selection should be matched to the grip requirement, while the verified low-head geometry helps confirm whether the head will fit within the available machine envelope.

Technical Highlights

  • Material: Alloy Steel
  • Thread Size: 6-32
  • Length: 1/2 in.
  • Basic Diameter: 0.138 in.
  • Head Diameter: 0.221-0.226 in.
  • Head Height: 0.066-0.072 in.
  • Hex Socket Size: 1/16 in.
  • Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands N/A Cold Headers, Inc.
Diameter N/A 6-32
Length N/A 1/4 in N/A 5/16 in N/A 3/8 in N/A 7/16 in N/A 1/2 in
Basic Diameter N/A 0.138 in
Maximum Head Diameter N/A 0.226 in
Minimum Head Diameter N/A 0.221 in
Maximum Head Height N/A 0.072 in
Minimum Head Height N/A 0.066 in
Hex Socket Size N/A 1/16 in
Minimum Key Engagement N/A
Material N/A Alloy Steel
Quantity N/A 100
Package Type N/A Box
Note N/A Less Than Package Quantity Specified Plus 25%.